U.S. patent application number 16/959480 was filed with the patent office on 2022-01-06 for light-emitting diode display panel and manufacturing method thereof, display device.
This patent application is currently assigned to BOE Technology Group Co., Ltd.. The applicant listed for this patent is BOE Technology Group Co., Ltd.. Invention is credited to Xiaochuan Chen, Yongfa Dong, Kuanta Huang, Dongsheng Li, Yunlong Li, Pengcheng Lu, Xiaobin Shen, Hui Tong, Qing Wang, Yu Wang, Shengji Yang, Xiong Yuan.
Application Number | 20220006062 16/959480 |
Document ID | / |
Family ID | 1000005852498 |
Filed Date | 2022-01-06 |
United States Patent
Application |
20220006062 |
Kind Code |
A1 |
Li; Dongsheng ; et
al. |
January 6, 2022 |
Light-Emitting Diode Display Panel and Manufacturing Method
Thereof, Display Device
Abstract
A light-emitting diode (LED) display panel, a manufacturing
method thereof, and an organic light-emitting diode (OLED) display
device are disclosed. The LED display panel includes: a base
substrate; and a plurality of sub-pixels, a color resistance layer
and a light-shielding structure located on the base substrate. The
base substrate includes a display region and a periphery region;
the sub-pixels are located in the display region; the
light-shielding structure is an annular structure located in the
periphery region. The light-shielding structure includes a first
light-shielding structure and a second light-shielding structure
located at a side of the first light-shielding structure away from
the base substrate, a second orthographic projection of the second
light-shielding structure on the base substrate is located within a
first orthographic projection of the first light-shielding
structure on the base substrate, and the first orthographic
projection is not completely coincident with the second
orthographic projection.
Inventors: |
Li; Dongsheng; (Beijing,
CN) ; Huang; Kuanta; (Beijing, CN) ; Li;
Yunlong; (Beijing, CN) ; Yang; Shengji;
(Beijing, CN) ; Lu; Pengcheng; (Beijing, CN)
; Chen; Xiaochuan; (Beijing, CN) ; Wang; Qing;
(Beijing, CN) ; Tong; Hui; (Beijing, CN) ;
Dong; Yongfa; (Beijing, CN) ; Shen; Xiaobin;
(Beijing, CN) ; Yuan; Xiong; (Beijing, CN)
; Wang; Yu; (Beijing, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
BOE Technology Group Co., Ltd. |
Beijing |
|
CN |
|
|
Assignee: |
BOE Technology Group Co.,
Ltd.
Beijing
CN
|
Family ID: |
1000005852498 |
Appl. No.: |
16/959480 |
Filed: |
August 23, 2019 |
PCT Filed: |
August 23, 2019 |
PCT NO: |
PCT/CN2019/102288 |
371 Date: |
July 1, 2020 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
H01L 51/56 20130101;
H01L 51/5284 20130101; H01L 27/3218 20130101 |
International
Class: |
H01L 51/52 20060101
H01L051/52; H01L 27/32 20060101 H01L027/32; H01L 51/56 20060101
H01L051/56 |
Claims
1. A light-emitting diode (LED) display panel, comprising: a base
substrate, comprising a display region and a periphery region
surrounding the display region; a plurality of sub-pixels, located
in the display region and located at a side of the base substrate,
at least one sub-pixel of the plurality of sub-pixels comprising: a
light-emitting element, comprising a first electrode, a
light-emitting functional layer and a second electrode that are
sequentially laminated, the first electrode being closer to the
base substrate as compared to the second electrode; and a driver
circuit, located between the light-emitting element and the base
substrate, the driver circuit comprising a driving transistor and a
storage capacitor, the driving transistor comprising a source
electrode, a drain electrode and a gate electrode, one of the
source electrode and the drain electrode being coupled with the
first electrode, the gate electrode being coupled with the storage
capacitor, and the storage capacitor being configured to store a
digital signal; the LED display panel further comprising; a color
resistance layer, located at a side of the second electrode away
from the base substrate, light emitted from the light-emitting
element exiting through the color resistance layer; and a
light-shielding structure, located in the periphery region and
having an annular structure surrounding the plurality of
sub-pixels, wherein the light-shielding structure comprises a first
light-shielding structure and a second light-shielding structure,
the second light-shielding structure is located at a side of the
first light-shielding structure away from the base substrate, a
second orthographic projection of the second light-shielding
structure on the base substrate is located within a first
orthographic projection of the first light-shielding structure on
the base substrate, and the first orthographic projection is not
completely coincident with the second orthographic projection.
2. The LED display panel according to claim 1, wherein at least
part of an edge of the first light-shielding structure is not
covered by the second light-shielding structure.
3. The LED display panel according to claim 2, wherein both an
inner edge and an outer edge of the first light-shielding structure
are not covered by the second light-shielding structure.
4. The LED display panel according to claim 1, wherein an outer
contour of the first light-shielding structure comprises a first
side extending along a first direction and a second side extending
along a second direction, the first direction is intersected with
the second direction, the first side is connected with the second
side through a cambered side, and the cambered side is curved
towards a direction away from the display region.
5. The LED display panel according to claim 4, wherein the cambered
side comprises a rounded angle, and the outer contour of the first
light-shielding structure is a rectangle with rounded angles.
6. The LED display panel according to claim 5, wherein a circle
comprising the cambered side is tangent with the first side or the
second side.
7. The LED display panel according to claim 1, wherein a shape of
the first light-shielding structure is a closed annulus, and/or, a
shape of the second light-shielding structure is a closed
annulus.
8. (canceled)
9. The LED display panel according to claim 1, wherein a shape of
the second light-shielding structure is as same as a shape of the
first light-shielding structure, and an area of the second
orthographic projection is smaller than an area of the first
orthographic projection.
10. The LED display panel according to claim 1, wherein the color
resistance layer comprises a plurality of color resistance
sub-layers, the plurality of color resistance sub-layers are in
one-to-one correspondence with the plurality of sub-pixels, at
least part of adjacent ones of the plurality of color resistance
sub-layers are not overlapped with each other, the plurality of
color resistance sub-layers comprise a plurality of first color
resistance sub-layers, and the plurality of first color resistance
sub-layers and the first light-shielding structure are located in a
same layer and are made of a same material.
11. The LED display panel according to claim 10, wherein the
plurality of color resistance sub-layers further comprise a
plurality of second color resistance sub-layers, the plurality of
second color resistance sub-layers and the second light-shielding
structure are located in a same layer and are made of a same
material.
12. The LED display panel according to claim 10, wherein the
light-shielding structure further comprises a third light-shielding
structure, the third light-shielding structure is located at a side
of the second light-shielding structure away from the first
light-shielding structure.
13. The LED display panel according to claim 12, wherein an
orthographic projection of the third light-shielding structure on
the base substrate is completely coincident with the first
orthographic projection, or, the orthographic projection ofthe
third light-shielding structure on the base substrate is located
within the second orthographic projection.
14. (canceled)
15. The LED display panel according to claim 12, wherein the
plurality of color resistance sub-layers further comprise a
plurality of third color resistance sub-layers, the plurality of
third color resistance sub-layers and the third light-shielding
structure are located in a same layer and are made of a same
material.
16. The LED display panel according to claim 15, wherein the first
color resistance sub-layer, the second color resistance sub-layer
and the third color resistance sub-layer are color filter layers of
different colors.
17. The LED display panel according to claim 1, wherein the
light-shielding structure covers part of the second electrode.
18. The LED display panel according to claim 1, further comprising:
a sensing region located in the periphery region, wherein an
orthographic projection of the sensing region on the base substrate
is located within the first orthographic projection.
19. (canceled)
20. (canceled)
21. The LED display panel according to claim 1, wherein a side of
the color resistance layer facing the base substrate is provided
with a first film encapsulation layer, and a side of the color
resistance layer away from the base substrate is provided with a
second film encapsulation layer.
22. A manufacturing method of the LED display panel according to
claim 1, comprising: providing the base substrate; forming the
light-emitting element in the display region on the base substrate;
coating a first color resistance material on the light-emitting
element; patterning the first color resistance material to form a
first color resistance layer in the display region and form the
first light-shielding structure surrounding the display region in
the periphery region; coating a second color resistance material on
the first color resistance layer and on the first light-shielding
structure; and patterning the second color resistance material to
form a second color resistance layer in the display region and form
the second light-shielding structure surrounding the display region
in the periphery region, at least part of the second color
resistance layer being not overlapped with the first color
resistance layer, wherein forming the second light-shielding
structure comprises: patterning the second color resistance
material to allow the second orthographic projection to be located
within the first orthographic projection and to allow the first
orthographic projection to be not completely coincident with the
second orthographic projection.
23. The manufacturing method according to claim 22, wherein forming
the first light-shielding structure comprises: patterning the first
color resistance material to allow an outer contour of the first
light-shielding structure to comprise a first side extending along
a first direction and a second side extending along a second
direction, wherein the first direction is intersected with the
second direction, the first side is connected with the second side
through a cambered side, and the cambered side is curved towards a
direction away from the display region.
24. An organic light-emitting diode (OLED) display device,
comprising the LED display panel according to claim 1.
Description
TECHNICAL FIELD
[0001] At least one embodiment of the present disclosure relates to
a light-emitting diode display panel, a manufacturing method
thereof and an organic light-emitting diode display device.
BACKGROUND
[0002] At present, usually, Si-based active matrix organic
light-emitting diode (AMOLED) color display is realized by adopting
white organic light-emitting diode (WOLED) in cooperation with
color filter (CF). Micro-display incorporated with Si-based AMOLED
possesses broad market application space, and is especially
applicable for helmet-mounted display, auto-stereoscopic display
mirror, eyeglass display and the like.
SUMMARY
[0003] At least one embodiment of the present disclosure relates to
a light-emitting diode display panel, a manufacturing method
thereof and an organic light-emitting diode display device. The
light-emitting diode (LED) display panel includes: a base substrate
including a display region and a periphery region surrounding the
display region; and a plurality of sub-pixels located in the
display region and located at a side of the base substrate. At
least one sub-pixel of the plurality of sub-pixels includes: a
light-emitting element including a first electrode, a
light-emitting functional layer and a second electrode that are
sequentially laminated, the first electrode is closer to the base
substrate as compared to the second electrode; and a driver circuit
located between the light-emitting element and the base substrate,
the driver circuit includes a driving transistor and a storage
capacitor, the driving transistor includes a source electrode, a
drain electrode and a gate electrode, one of the source electrode
and the drain electrode is coupled with the first electrode, the
gate electrode is coupled with the storage capacitor, and the
storage capacitor is configured to store a digital signal. The LED
display panel further includes: a color resistance layer located at
a side of the second electrode away from the base substrate, light
emitted from the light-emitting element exits through the color
resistance layer; and a light-shielding structure, located in the
periphery region and having an annular structure surrounding the
plurality of sub-pixels. The light-shielding structure includes a
first light-shielding structure and a second light-shielding
structure, the second light-shielding structure is located at a
side of the first light-shielding structure away from the base
substrate, a second orthographic projection of the second
light-shielding structure on the base substrate is located within a
first orthographic projection of the first light-shielding
structure on the base substrate, and the first orthographic
projection is not completely coincident with the second
orthographic projection.
[0004] In some examples, at least part of an edge of the first
light-shielding structure is not covered by the second
light-shielding structure.
[0005] In some examples, both an inner edge and an outer edge of
the first light-shielding structure are not covered by the second
light-shielding structure.
[0006] In some examples, an outer contour of the first
light-shielding structure includes a first side extending along a
first direction and a second side extending along a second
direction, the first direction is intersected with the second
direction, the first side is connected with the second side through
a cambered side, and the cambered side is curved towards a
direction away from the display region.
[0007] In some examples, the cambered side includes a rounded
angle, and the outer contour of the first light-shielding structure
is a rectangle with rounded angles.
[0008] In some examples, a circle including the cambered side is
tangent with the first side or the second side.
[0009] In some examples, a shape of the first light-shielding
structure is a closed annulus.
[0010] In some examples, a shape of the second light-shielding
structure is a closed annulus.
[0011] In some examples, a shape of the second light-shielding
structure is as same as a shape of the first light-shielding
structure, and an area of the second orthographic projection is
smaller than an area of the first orthographic projection.
[0012] In some examples, the color resistance layer includes a
plurality of color resistance sub-layers, the plurality of color
resistance sub-layers are in one-to-one correspondence with the
plurality of sub-pixels, at least part of adjacent ones of the
plurality of color resistance sub-layers are not overlapped with
each other, the plurality of color resistance sub-layers include a
plurality of first color resistance sub-layers, and the plurality
of first color resistance sub-layers and the first light-shielding
structure are located in a same layer and are made of a same
material.
[0013] In some examples, the plurality of color resistance
sub-layers further include a plurality of second color resistance
sub-layers, the plurality of second color resistance sub-layers and
the second light-shielding structure are located in a same layer
and are made of a same material.
[0014] In some examples, the light-shielding structure further
includes a third light-shielding structure, the third
light-shielding structure is located at a side of the second
light-shielding structure away from the first light-shielding
structure.
[0015] In some examples, an orthographic projection of the first
light-shielding structure on the base substrate is located within
an orthographic projection of the third light-shielding structure
on the base substrate.
[0016] In some examples, an orthographic projection of the third
light-shielding structure on the base substrate is located within
an orthographic projection of the second light-shielding structure
on the base substrate.
[0017] In some examples, the plurality of color resistance
sub-layers further include a plurality of third color resistance
sub-layers, the plurality of third color resistance sub-layers and
the third light-shielding structure are located in a same layer and
are made of a same material.
[0018] In some examples, the first color resistance sub-layer, the
second color resistance sub-layer and the third color resistance
sub-layer are color filter layers of different colors.
[0019] In some examples, the light-shielding structure covers part
of the second electrode.
[0020] In some examples, the LED display panel further includes: a
sensing region located in the periphery region, and an orthographic
projection of the sensing region on the base substrate is located
within an orthographic projection of the first light-shielding
structure on the base substrate.
[0021] In some examples, the base substrate is a Si-based
substrate.
[0022] In some examples, at least part of the driving transistor is
located in the Si-based substrate.
[0023] In some examples, a side of the color resistance layer
facing the base substrate is provided with a first film
encapsulation layer, and a side of the color resistance layer away
from the base substrate is provided with a second film
encapsulation layer.
[0024] At least one embodiment of the present disclosure provides a
manufacturing method of the LED display panel described above,
including: providing the base substrate; forming the light-emitting
element in the display region on the base substrate; coating a
first color resistance material on the light-emitting element by a
spin-coating method; patterning the first color resistance material
to form a first color resistance layer in the display region and
form the first light-shielding structure surrounding the display
region in the periphery region; coating a second color resistance
material on the first color resistance layer and on the first
light-shielding structure by the spin-coating method; and
patterning the second color resistance material to form a second
color resistance layer in the display region and form the second
light-shielding structure surrounding the display region in the
periphery region, at least part of the second color resistance
layer is not overlapped with the first color resistance layer.
Forming the second light-shielding structure includes: patterning
the second color resistance material to allow the second
orthographic projection to be located within the first orthographic
projection and to allow the first orthographic projection to be not
completely coincident with the second orthographic projection.
[0025] In some examples, forming the first light-shielding
structure includes: patterning the first color resistance material
to allow an outer contour of the first light-shielding structure to
include a first side extending along a first direction and a second
side extending along a second direction, the first direction is
intersected with the second direction, the first side is connected
with the second side through a cambered side, and the cambered side
is curved towards a direction away from the display region.
[0026] At least one embodiment of the present disclosure provides
an organic light-emitting diode (OLED) display device, including
the LED display panel described in any of the examples above.
BRIEF DESCRIPTION OF THE DRAWINGS
[0027] In order to clearly illustrate the technical solutions of
the embodiments of the disclosure, the drawings of the embodiments
will be briefly described in the following; it is obvious that the
described drawings below are only related to some embodiments of
the disclosure and thus are not limitative to the disclosure.
[0028] FIG. 1 is a partial structural diagram of a color filter
structure in a Si-based organic light-emitting diode (OLED) display
panel;
[0029] FIGS. 2A-2H are schematic diagrams of a color filter
structure provided by an embodiment of the present disclosure;
[0030] FIGS. 3A-3E are schematic diagrams of a color filter
structure provided by another embodiment of the present
disclosure;
[0031] FIG. 4 is a partial sectional view of a light-emitting diode
(LED) display panel provided by an embodiment of the present
disclosure;
[0032] FIG. 5 is a schematic circuit diagram of a Si-based OLED
display panel provided by an embodiment of the present
disclosure;
[0033] FIG. 6 is a circuit diagram illustrating a voltage control
circuit and a pixel circuit provided by an embodiment of the
present disclosure; and
[0034] FIG. 7 is a flow chart of forming a LED display panel
provided by an embodiment of the present disclosure.
DETAILED DESCRIPTION
[0035] In order to make objects, technical details and advantages
of the embodiments of the disclosure apparent, the technical
solutions of the embodiments will be described in a clearly and
fully understandable way in connection with the drawings related to
the embodiments of the disclosure. Apparently, the described
embodiments are just a part but not all of the embodiments of the
disclosure. Based on the described embodiments herein, those
skilled in the art can obtain other embodiment(s), without any
inventive work, which should be within the scope of the
disclosure.
[0036] Unless otherwise defined, all the technical and scientific
terms used herein have the same meanings as commonly understood by
one of ordinary skill in the art to which the present disclosure
belongs. The terms "first," "second," etc., which are used in the
present disclosure, are not intended to indicate any sequence,
amount or importance, but distinguish various components. Also, the
terms "comprise," "comprising," "include," "including," etc., are
intended to specify that the elements or the objects stated before
these terms encompass the elements or the objects and equivalents
thereof listed after these terms, but do not preclude the other
elements or objects. The phrases "connect", "connected", etc., are
not intended to define a physical connection or mechanical
connection, but may include an electrical connection, directly or
indirectly. "On," "under," "right," "left" and the like are only
used to indicate relative position relationship, and when the
position of the object which is described is changed, the relative
position relationship may be changed accordingly.
[0037] Embodiments of the present disclosure provide a
light-emitting diode (LED) display panel, a manufacturing method
thereof and an organic light-emitting diode (OLED) display device.
The LED display panel includes: a base substrate, a plurality of
sub-pixels located on the base substrate, and a color resistance
layer and a light-shielding structure that are located at a side of
the plurality of sub-pixels away from the base substrate. The base
substrate includes a display region and a periphery region
surrounding the display region; the plurality of sub-pixels are
located in the display region. At least one sub-pixel of the
plurality of sub-pixels includes: a light-emitting element
including a first electrode, a light-emitting functional layer and
a second electrode that are sequentially laminated, the first
electrode is closer to the base substrate as compared to the second
electrode; and a driver circuit located between the light-emitting
element and the base substrate, the driver circuit includes a
driving transistor and a storage capacitor, the driving transistor
includes a source electrode, a drain electrode and a gate
electrode, one of the source electrode and the drain electrode is
coupled with the first electrode, the gate electrode is coupled
with the storage capacitor, and the storage capacitor is configured
to store a digital signal. The color resistance layer is located at
a side of the second electrode away from the base substrate, light
emitted from the light-emitting element exits through the color
resistance layer. The light-shielding structure is located in the
periphery region and has an annular structure surrounding the
plurality of sub-pixels. The light-shielding structure includes a
first light-shielding structure and a second light-shielding
structure, the second light-shielding structure is located at a
side of the first light-shielding structure away from the base
substrate, a second orthographic projection of the second
light-shielding structure on the base substrate is located within a
first orthographic projection of the first light-shielding
structure on the base substrate, and the first orthographic
projection is not completely coincident with the second
orthographic projection. In the embodiments of the present
disclosure, by designing a distance between an inner annulus and an
outer annulus of the second light-shielding structure to be smaller
than a distance between an inner annulus and an outer annulus of
the first light-shielding structure so as to form a stepped
structure, it facilitates the flow of the color resistance material
during forming subsequent color resistance layer(s) by a
spin-coating method, so as to further improve the uniformity of the
color resistance layer formed in the display region, and to prevent
from the occurrence of non-uniform display in the subsequent
display period.
[0038] Hereinafter, the LED display panel, the manufacturing method
thereof and the OLED display device provided by the embodiments of
the present disclosure will be described in connection with the
drawings.
[0039] FIG. 1 is a partial structural diagram of a color filter
structure in a Si-based organic light-emitting diode (OLED) display
panel provided by an embodiment of the present disclosure. As
illustrated in FIG. 1, the OLED display panel includes a display
region 11 and a periphery region 12 surrounding the display region
11; a color filter structure 10 includes a color resistance layer
(not illustrated) located in the display region 11 and an
annular-shaped light-shielding structure located in the periphery
region 12. The light-shielding structure is configured to cover
elements in the periphery region 12 of the display panel, for
example, anode wirings for connecting light-emitting elements of
the display panel, pixel sensing circuits and the like, so as to
prevent from the occurrence of light reflection or light leakage in
the periphery region.
[0040] In order to achieve better shielding effect in the periphery
region of the Si-based OLED display panel, the light-shielding
structure may include at leas two layers of color filter laminated
layers. In the case where the light-shielding structure includes
two layers or three layers of color filter laminated layers, a
thickness of the light-shielding structure in the periphery region
is 2-3 times of that of a pixel color filter in the display region,
which may result in a circle of barrier wall to be formed around
the display region.
[0041] FIGS. 2A-2H are schematic diagrams of a color filter
structure provided by an embodiment of the present disclosure. FIG.
2A is a plan structural diagram of a first color filter layer, and
FIG. 2B is a sectional structural diagram of the first color filter
layer taken along AA line of FIG. 2A. As illustrated in FIG. 2A and
FIG. 2B, the color filter structure includes: a transparent base
layer 100 and a first color filter layer 200 located on the
transparent base layer 100. The transparent base layer 100 includes
a display region 101 and a periphery region 102 surrounding the
display region 101. For example, the display region 101 is a region
configured to display an image, i.e., a light exiting region; the
periphery region 102 is a region that does not display an image,
i.e., a non-light exiting region.
[0042] As illustrated in FIG. 2A and FIG. 2B, the first color
filter layer 200 includes a first pixel color filter 210 located in
the display region 101 and a first frame color filter 220 located
in the periphery region 102. The first frame color filter 220 is an
annular-shaped color filter surrounding the display region 101, and
is configured to cover structures in the periphery region of the
display panel including the color filter structure, for example,
wirings for connecting light-emitting elements, and to cover
sensing circuit structures or the like (the sensing circuit
structure may be connected to a temperature sensor) configured to
detect the current of pixels in the sensing region, so as to
prevent from light reflection or light leakage in the periphery
region. That is to say, the LED display panel provided by the
embodiment of the present disclosure includes a color resistance
layer located in the display region 101, the color resistance layer
includes a plurality of color resistance sub-layers, the plurality
of color resistance sub-layers are in one-to-one correspondence
with the plurality of sub-pixels, at least part of adjacent ones of
the plurality of color resistance sub-layers are not overlapped
with each other, the plurality of color resistance sub-layers
include a plurality of first color resistance sub-layers.
Hereinafter, the embodiments of the present disclosure will be
described with reference to the case where the first color
resistance sub-layer is the first pixel color filter 210, and the
first light-shielding structure included in the LED display panel
is the first frame color filter 220, by way of example. For
example, the plurality of first color resistance sub-layers and the
first light-shielding structure are located in a same layer and are
made of a same material. The term "located in a same layer" used
here and appeared in the following refers to a relationship between
several film layers formed from a same material by a same step
(e.g., a one-step patterning process). The term "located in a same
layer" used here is not intended to always indicate that the
several film layers have a same thickness or have a same height in
the sectional views.
[0043] In some examples, as illustrated in FIG. 2A, an outer
contour of the first light-shielding structure 220 includes a first
side Si extending along a first direction (i.e., the X direction)
and a second side S2 extending along a second direction (i.e., the
Y direction), the first direction is intersected with the second
direction, the first side S1 is connected with the second side S2
through a cambered side 221, and the cambered side 221 is curved
towards a direction away from the display region 101. For example,
both the first side and the second side are straight sides.
[0044] In some examples, as illustrated in FIG. 2A and FIG. 2B, at
least one angle of an outer contour of the first frame color filter
220 (i.e., the first light-shielding structure) may be a rounded
angle 221. A shape of the outer contour of the first frame color
filter 220 refers to a shape of an outer frame of an annular-shaped
first frame color filter 220.
[0045] Compared to the light-shielding structure having an outer
frame including a sharp angle as illustrated in FIG. 1, the
embodiment of the present disclosure designs at least one angle of
an outer annulus of the first frame color filter as a cambered
side, so that during the subsequent process of forming other color
filter layers, the probability that a color filter material dropped
onto an outer side of the first frame color filter presents a
divergent shape during the spin-coating process due to an influence
of the sharp angle of the outer frame of the first frame color
filter is reduced, so as to allow the color filter layer coated in
the display region to be more uniform, thereby preventing from the
occurrence of non-uniform display in the display device including
the color filter structure.
[0046] For example, all the angles of the outer annulus (i.e., the
outer contour) of the first frame color filter 220 are rounded
angles, so that in the subsequent process of forming other color
filter layers, the color filter material dropped onto the outer
side of the first frame color filter would not present a divergent
shape due to the influence of the sharp angle of the outer frame of
the first frame color filter, thereby further improving the
uniformity of the color filter layer coated in the display
region.
[0047] In some examples, as illustrated in FIG. 2A, the outer
annulus of the first frame color filter 220 is a rounded-angle
rectangle, that is, the outer annulus of the first frame color
filter 220 is a rectangle having four angles which are all rounded
angles. The inner annulus of the first frame color filter 220 is
determined according to the shape of the display region 101 as
actually demanded, for example, it may be a right-angle rectangle,
i.e., the inner annulus of the first frame color filter 220 is a
rectangle having four angles which are all right angles.
[0048] In some examples, as illustrated in FIG. 2A, a circle
including a rounded angle 221 is tangent with a first side or a
second side connected with the rounded angle 221 so as to
facilitate the manufacture. The circle including the rounded angle
221 being tangent with a straight side may prevent a sharp angle
from negatively affecting a coating process of colored
photoresists. Moreover, the greater the curvature radius of the
rounded angle 221 is, the more advantageous for improving the
uniformity of the color filter layer located in the display region
will be. However, an increased curvature radius of the rounded
angle 221 may result in smaller light-shielding regions at four
rounded angles of the frame color filter. Therefore, under the
circumstance of ensuring that the underlying wirings are covered, a
greater curvature radius of the rounded angle would be better.
[0049] In some examples, as illustrated in FIG. 2A, a shape of the
first frame color filter 220 is a closed annulus. That is to say,
the first frame color filter is a continuous, annular-shaped
light-shielding layer which covers the periphery region, so as to
prevent the structures in the periphery region of the display
panel, including the color filter structure, from reflecting light,
thereby achieving a better anti-reflecting effect.
[0050] For example, as illustrated in FIG. 2A and FIG. 2B, the
first pixel color filter 210 located in the display region 101
includes a plurality of first sub-pixel color filters (i.e., a
plurality of first color resistance sub-layers) arranged in an
array, and a space is provided between adjacent first sub-pixel
color filters so as to subsequently form pixel color filters of
different colors. In the embodiment of the present disclosure, the
first pixel color filter located in the display region is
configured to be right opposite to the light-emitting element in
the display panel so as to perform color filtering function on the
white light emitted by the light-emitting element.
[0051] FIG. 2C is a plan structural diagram of a second color
filter layer, and FIG. 2D is a sectional structural diagram of the
second color filter layer taken along AA line of FIG. 2C. As
illustrated in FIG. 2C and FIG. 2D, the color filter structure
further includes a second color filter layer 300. The second color
filter layer 300 includes: a second pixel color filter 310 located
in the display region 101, at least part of the second pixel color
filter 310 is not overlapped with the first pixel color filter 210;
and a second frame color filter 320 located in the periphery region
102. That is, the light-shielding structure further includes a
second light-shielding structure, and the plurality of color
resistance sub-layers further include a plurality of second color
resistance sub-layers. Hereinafter, the embodiments of the present
disclosure will be described with reference to the case where the
second pixel color filter 310 is the second color resistance
sub-layer, and the second frame color filter 320 is the second
light-shielding structure, by way of example. For example, the
plurality of second color resistance sub-layers and the second
light-shielding structure are located in a same layer and are made
of a same material. That is to say, the second color resistance
sub-layer and the second light-shielding structure are two film
layers formed by a same patterning process performed to a second
color resistance material.
[0052] FIG. 2C and FIG. 2D illustrate that the second pixel color
filter 310 is connected with the first pixel color filter 210,
without limited thereto. For example, the second pixel color filter
may also be partly overlapped with the first pixel color filter,
and an overlapped portion of the first pixel color filter and the
second pixel color filter may serve for light-shielding so as to
save a black matrix. For example, the second pixel color filter may
also be separated from the first pixel color filter, and a space
between the first pixel color filter and the second pixel color
filter may be provided with a black matrix so as to prevent from
crosstalk.
[0053] For example, as illustrated in FIG. 2C and FIG. 2D, the
second pixel color filter 310 includes a plurality of second
sub-pixel color filters (i.e., a plurality of second color
resistance sub-layers), at least part of the second sub-pixel color
filter is not overlapped with the first sub-pixel color filter, one
side of the second sub-pixel color filter may be connected with the
first sub-pixel color filter and the other side of the second
sub-pixel color filter may have a certain distance from the first
sub-pixel color filter so as to subsequently form pixel color
filters having a color different from both the first pixel color
filter and the second pixel color filter. Of course, the
embodiments of the present disclosure are not limited thereto, and
the first sub-pixel color filter may be alternately arranged with
the second sub-pixel color filter and also connected with the
second sub-pixel color filter.
[0054] As illustrated in FIG. 2C, the second frame color filter 320
is an annular-shaped color filter layer surrounding the display
region 101, for example, a closed, annular-shaped color filter
layer. The second frame color filter 320 is located at a side of
the first frame color filter 220 away from the transparent base
layer 100 so as to be overlapped with the first frame color filter
220, thereby serving for light-shielding and anti-light reflecting
together with the first frame color filter.
[0055] For example, as illustrated in FIG. 2C, when an angle of the
outer contour of the first frame color filter 220 is a rounded
angle, during the process of forming the second color filter layer
300 by using the spin-coating method, the thickness of the second
pixel color filter 310 spin-coated in the display region 101 is
relatively uniform, so as to prevent from the occurrence of
non-uniform display in the subsequent display period.
[0056] In some examples, as illustrated in FIG. 2C, a shape of the
second frame color filter 320 may be as same as a shape of the
first frame color filter 220. That is, the outer contour of the
second frame color filter 320 includes a cambered side 321 located
at an included angle between the first side and the second side, so
that during the process of subsequently forming color filter layers
by using a spin-coating method, the color filter layer spin-coated
in the display region has better uniformity. When the inner annulus
of the first frame color filter is configured to define a shape of
the display region, the shape of the inner annulus of the second
frame color filter is not limited. For example, the shape of the
inner annulus of the second frame color filter may be a right-angle
rectangle, and may also be a rounded-angle rectangle.
[0057] In some examples, as illustrated in FIG. 2C and FIG. 2D, an
orthographic projection of the second frame color filter 320 on the
transparent base layer 100 is located within an orthographic
projection of the first frame color filter 220 on the transparent
base layer 100; and along a direction from a center of the display
region 101 to the periphery region, a size of the first frame color
filter 220 is greater than a size of the second frame color filter
320 so as to form a stepped structure. A distance between the inner
annulus and the outer annulus of the first frame color filter 220
is greater than a distance between the inner annulus and the outer
annulus of the second frame color filter 320 to form a stepped
structure. That is, referring to the plan view illustrated in FIG.
2C, a second orthographic projection of the second light-shielding
structure 320 on the transparent base layer 100 is located within a
first orthographic projection of the first light-shielding
structure 220 on the transparent base layer 100, and the first
orthographic projection is not completely coincident with the
second orthographic projection. For example, an area of the second
orthographic projection is smaller than an area of the first
orthographic projection.
[0058] Compared to the case where the size of the first frame color
filter is exactly the same with the size of the second frame color
filter, in the embodiments of the present disclosure, the distance
between the inner annulus and the outer annulus of the second frame
color filter is designed to be smaller than the distance between
the inner annulus and the outer annulus of the first frame color
filter so as to form a stepped structure, which can facilitate the
flow of the color filter material during the process of forming
subsequent color filter layers by using a spin-coating method,
thereby further improving the uniformity of the pixel color filters
formed in the display region and preventing from the occurrence of
non-uniform display during the subsequent display period.
[0059] In some examples, as illustrated in FIG. 2C, at least part
of an edge of the first light-shielding structure 220 is not
covered by the second light-shielding structure 320. That is, a
portion of the edge of the first light-shielding structure 220 not
covered is formed as a stepped structure.
[0060] In some examples, as illustrated in FIG. 2C, both an inner
edge and an outer edge of the first light-shielding structure 220
are not covered by the second light-shielding structure 320. That
is, two circles of stepped structures are formed at positions of
the inner contour and outer contour of the first light-shielding
structure 220.
[0061] For example, the above-mentioned stepped structure may be
located at a side of the second frame color filter close to the
display region, and may also be located at a side of the second
frame color filter away from the display region. Alternatively, the
above-mentioned stepped structure may be provided at both the side
of the second frame color filter close to the display region and
the side of the second frame color filter away from the display
region so as to be advantageous for the uniformity of the pixel
color filter subsequently formed in the display region.
[0062] For example, the first color filter layer 200 and the second
color filter layer 300 are two layers of color filter layers having
different colors. For example, the first color filter layer 200 and
the second color filter layer 300 may be red color filter layer and
green color filter layer, respectively; or, red color filter layer
and blue color filter layer, respectively; or, green color filter
layer and blue color filter layer, respectively; without
particularly limited in the embodiments of the present disclosure.
That is, the first color resistance sub-layer and the second color
resistance sub-layer are two layers of color filter layers having
different colors.
[0063] FIG. 2E is a plan structural diagram of a third color filter
layer, and FIG. 2F is a sectional structural diagram of the third
color filter layer taken along AA line of FIG. 2E. As illustrated
in FIG. 2E and FIG. 2F, the color filter structure further includes
a third color filter layer 400. The third color filter layer 400
includes: a third pixel color filter 410 located in the display
region 101, at least part of the third pixel color filter 410 is
not overlapped with the first pixel color filter 210 and the second
pixel color filter 310; and a third frame color filter 420 located
in the periphery region 102. That is, the light-shielding structure
further includes a third light-shielding structure, and the
plurality of color resistance sub-layers further include a
plurality of third color resistance sub-layers. Hereinafter, the
embodiments of the present disclosure will be described with
reference to the case where the third frame color filter 420 is the
third light-shielding structure, and the third pixel color filter
410 is the third color resistance sub-layer, by way of example. For
example, the plurality of third color resistance sub-layers and the
third light-shielding structure are located in a same layer and are
made of a same material. That is to say, the third color resistance
sub-layer and the third light-shielding structure are two film
layers formed by a same patterning process performed to a third
color resistance material.
[0064] FIG. 2E and FIG. 2F illustrate that the third pixel color
filter 410 is connected with the first pixel color filter 210 and
the second pixel color filter 310, without limited thereto. For
example, the third pixel color filter may also be partly overlapped
with both the first pixel color filter and the second pixel color
filter, and the overlapped portions described above may serve for
light-shielding so as to save the black matrix. For example, the
third pixel color filter may also be separated from the first pixel
color filter and the second pixel color filter, and a space between
adjacent pixel color filters may be provided with a black matrix so
as to prevent from crosstalk.
[0065] For example, as illustrated in FIG. 2E and FIG. 2F, the
third pixel color filter 410 includes a plurality of third
sub-pixel color filters (i.e., a plurality of third color
resistance sub-layers), one side of the third sub-pixel color
filter may be connected with the first sub-pixel color filter and
the other side of the third sub-pixel color filter may be connected
with the second sub-pixel color filter.
[0066] As illustrated in FIG. 2E, the third frame color filter 420
is an annular-shaped color filter layer surrounding the display
region 101, for example, a closed, annular-shaped color filter
layer. The third frame color filter 420 is located at a side of the
second frame color filter 320 away from the transparent base layer
100 so as to be overlapped with the second frame color filter 320
and the first frame color filter 220, thereby serving for
light-shielding together with the first frame color filter and the
second frame color filter. FIG. 2E illustrates that an angle of an
outer annulus of the third frame color filter is also a rounded
angle, but the embodiments of the present disclosure are not
limited thereto, and the angle of the outer annulus of the third
frame color filter may also be a sharp angle provided that no
subsequent color filter will be formed.
[0067] For example, as illustrated in FIG. 2E, when the angle of
the outer annulus of the second frame color filter is a rounded
angle, during the process of forming the third color filter layer
400 by using the spin-coating method, the thickness of the third
pixel color filter 410 spin-coated in the display region 101 is
relatively uniform, so as to prevent from the occurrence of
non-uniform display in the subsequent display period. Moreover,
during the process of forming the third color filter layer by using
the spin-coating method, a width of the second frame color filter
is designed to be smaller than a width of the first frame color
filter so as to form a stepped structure, which can facilitate the
flow of the material of the third color filter layer, thereby
further improving the uniformity of the third pixel color filter
formed in the display region and preventing from the occurrence of
non-uniform display during the subsequent display period.
[0068] For example, as illustrated in FIG. 2E and FIG. 2F, an
orthographic projection of the third frame color filter 420 on the
transparent base layer 100 may be completely coincident with the
orthographic projection of the first frame color filter 220 on the
transparent base layer 100, so as to realize the light-shielding
effect in a better way. The embodiments of the present disclosure
include such case but are not limited thereto, and the orthographic
projection of the first frame color filter on the transparent base
layer may also be located within the orthographic projection of the
third frame color filter on the transparent base layer. When a size
of the third frame color filter is greater than a size of the first
frame color filter, an inner contour of the third frame color
filter is configured to define the shape of the display region.
[0069] In some examples, as illustrated in FIG. 2E and FIG. 2F, the
first color filter layer 200, the second color filter layer 300 and
the third color filter layer 400 are color filter layers having
different colors. For example, these three color filter layers may
be red color filter layer, green color filter layer and blue color
filter layer, respectively. That is, the first color resistance
sub-layer, the second color resistance sub-layer and the third
color resistance sub-layer are color filter layers of different
colors. For example, the first color resistance sub-layer, the
second color resistance sub-layer and the third color resistance
sub-layer mentioned above may be red color filter layer, green
color filter layer and blue color filter layer, respectively.
[0070] FIG. 2G is a plan structural diagram of a third color filter
layer, and FIG. 2H is a sectional structural diagram of the third
color filter layer taken along AA line of FIG. 2G. As illustrated
in FIG. 2H and FIG. 2G, the orthographic projection of the third
frame color filter 420 (the third light-shielding structure 420) on
the transparent base layer 100 is located within the orthographic
projection of the second frame color filter 320 (the second
light-shielding structure 320) on the transparent base layer 100,
so as to prevent the light-shielding structure with relatively
greater thickness from shielding image light emitted outwardly from
the display region.
[0071] For example, as illustrated in FIG. 2G, the outer contour of
the third light-shielding structure 420 may include a cambered side
421, without limited thereto, as along as the orthographic
projection of the third light-shielding structure 420 on the base
substrate is located within the orthographic projection of the
second light-shielding structure 320 on the base substrate.
[0072] FIG. 2H illustrates that a width of the third
light-shielding structure 420 along a direction perpendicular to an
extension direction of the light-shielding structure is smaller
than a width of the second light-shielding structure 320 along the
direction perpendicular to the extension direction of the
light-shielding structure, without limited thereto. It's also
possible that, the orthographic projection of the third
light-shielding structure 420 on the transparent base layer 100 is
completely coincident with the orthographic projection of the
second light-shielding structure 320 on the transparent base layer
100, so as to facilitate the manufacture.
[0073] FIGS. 3A-3E are schematic diagrams of a color filter
structure provided by another embodiment of the present disclosure.
FIG. 3A is a plan structural diagram of a first color filter layer
and a fourth color filter layer, and FIG. 3B is a sectional
structural diagram of the first color filter layer and the fourth
color filter layer taken along BB line of FIG. 3A. As illustrated
in FIG. 3A and FIG. 3B, the color filter structure includes a
transparent base layer 100 and a first color filter layer 200
located on the transparent base layer 100. The transparent base
layer 100 includes a display region 101 and a periphery region 102
surrounding the display region 101.
[0074] As illustrated in FIG. 3A and FIG. 3B, the first color
filter layer 200 includes a first pixel color filter 210 located in
the display region 101 and a first frame color filter 220 located
in the periphery region 102. The first frame color filter 220 is an
annular-shaped color filter surrounding the display region 101, and
is configured to cover structures in the periphery region of the
display panel including the color filter structure, for example,
wirings for connecting light-emitting elements, and to cover
sensing circuit structures or the like (the sensing circuit
structure may be connected to a temperature sensor) configured to
detect the current of pixels in the sensing region, so as to
prevent from light reflection or light leakage in the periphery
region.
[0075] As illustrated in FIG. 3A and FIG. 3B, the outer annulus of
the first frame color filter 220 is a polygon, and at least one
angle of the polygon is a rounded angle 221. The outer annulus of
the first frame color filter 220 being a polygon refers to that,
the outer frame of the annular-shaped first frame color filter is a
polygon. The shape and effect of the first frame color filter in
the present embodiment are the same with those of the first frame
color filter illustrated in FIG. 2A and FIG. 2B, without repeatedly
described here.
[0076] As illustrated in FIG. 3A and FIG. 3B, the color filter
structure further includes a fourth color filter layer 500 which
only includes a fourth pixel color filter 510 located in the
display region 101, and at least part of the fourth pixel color
filter 510 is not overlapped with the first pixel color filter 210.
That is, the fourth color filter layer 500 does not include a frame
color filter located in the periphery region 102; i.e., in the case
where the display region 101 includes pixel color filters of two
colors, the periphery region 102 only includes one layer of color
filter layer so as to reduce the thickness of the frame color
filter in the periphery region. In the present embodiment, the
first color filter layer is formed after forming the fourth color
filter layer; because the fourth color filter layer does not
include a frame color filter, the uniformity of the subsequently
formed first color filter layer would not be affected, and the
first pixel color filter formed in the display region by adopting
the spin-coating method is uniform. The above-described first color
filter layer, second color filter layer and fourth color filter
layer may be red color filter layer, green color filter layer and
blue color filter layer, respectively. Colors of the first color
filter layer and the second color filter layer in the present
embodiment are as same as those of the first color filter layer and
the second color filter layer in the embodiment above,
respectively. The color of the fourth color filter layer in the
present embodiment may be as same as or different from that of the
third color filter layer in the embodiment above. The present
embodiment will be described with reference to the case where the
color of the fourth color filter layer is as same as that of the
third color filter layer in the embodiment above, by way of
example.
[0077] FIG. 3A and FIG. 3B illustrate that the fourth pixel color
filter 510 is connected with the first pixel color filter 210,
without limited thereto. FIG. 3C is a partial sectional view of a
color filter structure provided by another example of the
embodiment of the present disclosure. For example, as illustrated
in FIG.3C, the fourth pixel color filter 510 may also be partly
overlapped with the first pixel color filter 210, and an overlapped
portion of the first pixel color filter and the fourth pixel color
filter may serve for light-shielding so as to save a black matrix.
For example, as illustrated in FIG.3C, in the overlapped portion
215 of the fourth pixel color filter 510 and the first pixel color
filter 210, the fourth pixel color filter 510 is located at a side
of the first pixel color filter 210 close to the transparent base
layer 100.
[0078] Of course, the embodiments of the present disclosure are not
limited to this. For example, the fourth pixel color filter may
also be separated from the first pixel color filter, and a space
between the first pixel color filter and the fourth pixel color
filter may be provided with a black matrix so as to prevent from
crosstalk.
[0079] FIG. 3D is a plan structural diagram after forming a second
color filter layer, and FIG. 3E is a sectional structural diagram
of the second color filter layer taken along BB line of FIG. 3D. As
illustrated in FIG. 3D and FIG. 3E, the color filter structure
further includes a second color filter layer 300. The second color
filter layer 300 incudes: a second pixel color filter 310 located
in the display region 101, at least part of the second pixel color
filter 310 is not overlapped with the first pixel color filter 210
and the fourth pixel color filter 510; and a second frame color
filter 320 located in the periphery region 102. FIG. 3D and FIG. 3E
illustrate that the second pixel color filter 310 is connected with
the first pixel color filter 210 and the fourth pixel color filter
510, without limited thereto. For example, the second pixel color
filter may also be partly overlapped with the first pixel color
filter and the fourth pixel color filter, and the overlapped
portions above may serve for light-shielding so as to save a black
matrix. For example, in the overlapped portion of the second pixel
color filter and the fourth pixel color filter, the fourth pixel
color filter is located at a side of the second pixel color filter
close to the transparent base layer. For example, the second pixel
color filter may also be separated from the first pixel color
filter and the fourth pixel color filter, and a space between
adjacent pixel color filters may be provided with a black matrix so
as to prevent from crosstalk.
[0080] For example, in the embodiment of the present disclosure,
each type of pixel color filter includes a portion that is not
overlapped with other pixel color filters.
[0081] As illustrated in FIG. 3D, the second frame color filter 320
is an annular-shaped color filter layer surrounding the display
region 101, for example, a closed, annular-shaped color filter
layer. The second frame color filter 320 is located at a side of
the first frame color filter 220 away from the transparent base
layer 100 so as to be overlapped with the first frame color filter
220, and the orthographic projection of the first frame color
filter 220 on the transparent base layer 100 is located within the
orthographic projection of the second frame color filter 320 on the
transparent base layer 100; in this way, the second frame color
filter and the first frame color filter, together, serve for
light-shielding.
[0082] For example, as illustrated in FIG. 3D and FIG. 3E, the
orthographic projection of the first frame color filter 220 on the
transparent base layer 100 is completely coincident with the
orthographic projection of the second frame color filter 320 on the
transparent base layer 100, so as to facilitate the
manufacture.
[0083] For example, as illustrated in FIGS. 3A-3E, when the angle
of the outer annulus of the first frame color filter 220 is a
rounded angle, during the process of forming the second color
filter layer 300 by adopting a spin-coating method, the thickness
of the second pixel color filter 310 spin-coated in the display
region 101 is relatively uniform, so as to prevent from the
occurrence of non-uniform display in the subsequent display
period.
[0084] In some examples, as illustrated in FIG. 3D and FIG. 3E, the
first color filter layer 200, the second color filter layer 300 and
the fourth color filter layer 400 are color filter layers of
different colors. For example, these three color filter layers may
be red color filter layer, green color filter layer and blue color
filter layer, respectively.
[0085] Another embodiment of the present disclosure provides a LED
display panel. FIG. 4 is a partial sectional view of a LED display
panel provided by an embodiment of the present disclosure. In the
case where the embodiment of FIG. 4 includes the color filter
structure illustrated in FIG. 2E, by way of example, FIG. 4 is a
sectional view of the LED display panel taken along CC line of FIG.
2E, without limited thereto. The LED display panel provided by the
embodiments of the present disclosure may also include the color
filter structure illustrated in FIG. 3E or the like, as long as in
the direction perpendicular to the extension direction of the
light-shielding structure, the width of the second light-shielding
structure is smaller than the width of the first light-shielding
structure so as to form a stepped structure. For example, the LED
display panel provided by the embodiment of the present disclosure
may include any color filter structure described above.
[0086] As illustrated in FIG. 4, the LED display panel includes a
base substrate 600, a plurality of sub-pixels located on the base
substrate 600, and a color filter structure (e.g., the color
resistance layer and the light-shielding structure) located at a
display side of the sub-pixels. Hereinafter, description will be
given with reference to the case where the color filter structure
is as illustrated in FIG. 2E, by way of example.
[0087] As illustrated in FIG. 4, the plurality of sub-pixels are
located in the display region 101 and are located at a side of the
base substrate 600. At least one sub-pixel of the plurality of
sub-pixels includes: a light-emitting element 700 and a driver
circuit 610 located between the light-emitting element 700 and the
base substrate 600. The light-emitting element 700 includes a first
electrode 710, a light-emitting functional layer 720 and a second
electrode 730 that are sequentially laminated, the first electrode
710 is closer to the base substrate 600 as compared to the second
electrode 730. The driver circuit 610 includes a driving transistor
and a storage capacitor, the driving transistor includes a source
electrode, a drain electrode and a gate electrode, one of the
source electrode and the drain electrode is coupled with the first
electrode 710, the gate electrode is coupled with the storage
capacitor, and the storage capacitor is configured to store a
digital signal. The color resistance layer is located at a side of
the second electrode 730 away from the base substrate 600, light
emitted from the light-emitting element 700 exits through the color
resistance layer.
[0088] FIG. 4 merely illustrates a structure of the driver circuit
by way of example, and an example of more details of the structure
of the driver circuit may be referred to the following description
in connection with FIG. 6.
[0089] As illustrated in FIG. 4, the LED display panel further
includes a sensing region 103 located in the periphery region 102,
the sensing region 103 may include a sensing circuit structure (not
illustrated) configured to detect a current of the pixel, the
sensing circuit structure may be connected to a temperature sensor,
and the sensing circuit may be located at a side of the color
filter structure facing the base substrate 600. An orthographic
projection of the sensing region 103 on the transparent base layer
100 is located within the orthographic projection of the first
frame color filter 220 (i.e., the first light-shielding structure)
on the transparent base layer 100.
[0090] As illustrated in FIG. 4, the second electrode 730 of the
light-emitting element 700 in the display region 101 may extend
into the sensing region 103; and the first frame color filter 220
(i.e., the first light-shielding structure), the second frame color
filter 320 (i.e., the second light-shielding structure) and the
third frame color filter 420 (i.e., the third light-shielding
structure) cover the second electrode 730 which extends into the
sensing region. For example, the sensing region 103 includes a
sensing circuit structure 610' and a light-emitting element 700'
that is located in the same layer with the light-emitting element
700 of the display region; the above-described first frame color
filter 220, second frame color filter 320 and third frame color
filter 420, used as light-shielding structures, may block light
emitted from the light-emitting element of the sensing region.
Moreover, it should be explained that, FIG. 4 merely illustrates
structures of first frame color filter 220, second frame color
filter 320 and third frame color filter 420 located in the
periphery region, by way of example, but the embodiments of the
present disclosure are not limited thereto. For example, all of the
color filter structures described in the embodiments above may be
applied to the structure illustrated in FIG. 4. That is to way, the
color filter structure illustrated in FIG. 4 may be replaced by any
color filter structure of the embodiments above.
[0091] For example, each sub-pixel SP includes a light-emitting
element 700, as indicated by the dotted-line box illustrated in
FIG. 4. Each sub-pixel corresponds to one color resistance
sub-layer, for example, color resistance sub-layer 210, 310, 410 or
the like, so that light emitted from each sub-pixel displays a
corresponding color after being filtered through a corresponding
color resistance layer.
[0092] In some examples, as illustrated in FIG. 4, the base
substrate 600 is a Si-based substrate 600, a side of the Si-based
substrate 600 facing the light-emitting element 700 includes a
driver circuit 610, and the driver circuit 610 is connected with
the light-emitting element 700. That is, the Si-based substrate 600
is integrated with the driver circuit 610. For example, the
Si-based substrate 600 is integrated with the source electrode and
the drain electrode of the driving transistor in the driver circuit
610.
[0093] For example, the Si-based substrate may also be integrated
with a gate driver circuit and a data driver circuit (not
illustrated); a periphery region of the Si-based substrate is
provided with a flexible circuit board which is configured to
output an electrical signal to the gate driver circuit, the data
driver circuit and the light-emitting element. For example, the
gate driver circuit (not illustrated) is configured to generate a
gate driving signal, the data driver circuit (not illustrated) is
configured to generate a data signal, and both the gate driver
circuit and the data driver circuit may adopt conventional circuit
structures in the related art, without particularly limited in the
embodiments of the present disclosure.
[0094] For example, the driver circuit 610 is configured to provide
the light-emitting element 700 with a driving current under the
drive of a gate scanning signal, a data signal, a voltage signal or
the like, so that an organic light-emitting layer included in the
light-emitting element emits light. For example, the driver circuit
610 may adopt a pixel circuit of a circuit structure such as 4T1C,
4T2C, 7T1C, 8T2C and the like, and a driving method thereof may
adopt conventional methods in the related art, without repeatedly
described here. For example, the pixel circuit structure may be
manufactured on the Si-based substrate by adopting a CMOS process,
without particularly limited in the embodiments of the present
disclosure.
[0095] For example, as illustrated in FIG. 4, the Si-based
substrate 600 further includes a first insulating layer 620 and a
second insulating layer 650 located between the driver circuit 610
and the light-emitting element 700, and a via hole 630 is provided
in both of the two insulating layers. For example, the via hole 630
may be a tungsten hole filled with tungsten metal. In the case
where both the first insulating layer 620 and the second insulating
layer 650 have a greater thickness, forming a tungsten hole in the
first insulating layer 620 and the second insulating layer 650 can
ensure the stability of the conductive path. Furthermore, because
the process of forming the tungsten hole is mature, the first
insulating layer 620 and the second insulating layer 650 as
obtained have excellent surface flatness, which facilitates to
reduce a contact resistance between an electrode included in the
light-emitting element 700 and each of the first insulating layer
620 and the second insulating layer 650.
[0096] For example, as illustrated in FIG. 4, a metal layer 640 is
provided between the via holes 630 in the first insulating layer
620 and the in second insulating layer 650, so as to realize an
electrical connection between the light-emitting element 700 and
the driver circuit 610.
[0097] For example, as illustrated in FIG. 4, the first electrode
710 included in the light-emitting element 700 is electrically
connected with the driver circuit 610 through the via hole 630
located in the insulating layer, and the driver circuit 610 is
configured to drive the light-emitting element 700 to emit light.
The light-emitting element 700 includes a plurality of
light-emitting sub-elements, and light-emitting functional layers
720 of adjacent light-emitting sub-elements are spaced apart
through a pixel definition layer 800.
[0098] For example, the driver circuit 610 at least includes a
driving transistor and a switching transistor (not illustrated in
FIG. 4, referring to FIG. 6), and the driving transistor is
electrically connected with the first electrode 710. In this way,
an electrical signal that drives the light-emitting element 700 is
transmitted to the first electrode 710, so as to control the
light-emitting element 700 to emit light. For example, the driving
transistor includes a gate electrode, a source electrode and a
drain electrode. The source electrode of the driving transistor is
electrically connected with the first electrode 710. When the
driving transistor is in a turned-on state, an electrical signal
provided by a power source line may be transmitted to the first
electrode 710 through the source electrode of the driving
transistor. Because a voltage difference is generated between the
first electrode 710 and the second electrode 730, an electrical
field is formed there-between, and the light-emitting functional
layer 720 emits light under the effect of the electrical field.
[0099] For example, as illustrated in FIG. 4, the light-emitting
sub-elements included in the light-emitting element 700 are in
one-to-one correspondence with the sub-pixel color filters. For
example, the light emitted by the light-emitting element 700 is
white light, and the white light passes through the pixel color
filters of different colors located at the display side of the
light-emitting element 700 to realize colored display.
[0100] For example, as illustrated in FIG. 4, the sensing region
103 located in the periphery region 102 is further provided with a
light-emitting element as same as the light-emitting element 700 in
the display region 101. The light-emitting element located in the
sensing region 103 is not configured for display but for detecting
a degree of attenuation of pixel when emitting light, and needs to
be shielded by the frame color filter located in the periphery
region 102.
[0101] In some examples, as illustrated in FIG. 4, the transparent
base layer 100 is a film encapsulation layer, and the film
encapsulation layer is located at a side of the first color filter
layer 200 facing the light-emitting element 700.
[0102] For example, the transparent base layer 100 above is a first
film encapsulation layer, and a side of the color filter structure
away from the light-emitting element 700 is further provided with a
second film encapsulation layer 100'; the first film encapsulation
layer 100 and the second film encapsulation layer 100' can realize
an effective encapsulation of the light-emitting element and an
effective shield against moisture, oxygen and the like, so as to
achieve the objective of protecting the light-emitting element and
increasing the service life of the light-emitting element.
[0103] For example, a side of the second film encapsulation layer
away from the color filter structure is further provided with a
cover plate (not illustrated), the second film encapsulation layer
and the cover plate are sequentially disposed on the color filter
structure so as to protect the color filter structure. For example,
the second film encapsulation layer is formed by one or more
selected from organic materials or inorganic materials that have
better sealing property, so as to achieve better sealing effect and
to protect Si-based OLED display elements. For example, the cover
plate may adopt a transparent material, for example, the
transparent material may be an inorganic material such as glass or
an organic material such as polyimide. For example, in the
embodiment of the present disclosure, glass with high transmittance
may be adopted, without particularly limited here.
[0104] The technical effect(s) of the LED display panel provided by
the embodiments of the present disclosure may be referred to the
technical effect(s) of the color filter structure provided by the
embodiments of the present disclosure, without repeatedly described
here.
[0105] FIG. 5 is a schematic circuit diagram of a Si-based OLED
display panel provided by some embodiments of the present
disclosure. The Si-based OLED display panel includes: a plurality
of display elements L (i.e., light-emitting elements) located in
the display region 101 (AA region), and pixel circuits 110 coupled
with the plurality of display elements L in one-to-one
correspondence; the pixel circuit 110 includes a driving
transistor. Furthermore, the Si-based OLED display panel may
further include a plurality of voltage control circuits 120 located
in the periphery region 102 (a region in the Si-based OLED display
panel except the display region 101) of the Si-based OLED display
panel. For example, at least two pixel circuits 110 in one row
share one voltage control circuit 120; first electrodes of driving
transistors in one row of pixel circuits 110 are coupled to the
shared voltage control circuit; and the second electrode of each of
the driving transistors is coupled to the corresponding display
element L. The voltage control circuit 120 is configured to output
an initial signal Vinit to the first electrode of the driving
transistor in response to a reset control signal RE, so as to
control the corresponding display element L to reset; and is
configured to output a first power source signal VDD to the first
electrode of the driving transistor in response to a light-emitting
control signal EM, so as to drive the display element L to emit
light. By sharing the voltage control circuit 120, the structure of
the pixel circuit in the display region 101 can be simplified, and
an area occupied by the pixel circuit in the display region 101 can
be reduced, so that the display region 101 may be provided with
more pixel circuits and more display elements, thereby achieving an
OLED display panel with high PPI. Moreover, the voltage control
circuit 120 transmits the initial signal Vinit to the first
electrode of the driving transistor under the control of the reset
control signal RE so as to control the corresponding display
element to reset, thereby preventing a voltage applied to the
display element in a previous frame from affecting the illumination
in the next frame, and hence mitigating the ghosting
phenomenon.
[0106] For example, the Si-based OLED display panel may further
include a plurality of pixel units PX located in the display region
101, each of the pixel units PX includes a plurality of sub-pixels;
each of the sub-pixels includes one display element L and one pixel
circuit 110. Further, the pixel unit PX may include three
sub-pixels of different colors. These three sub-pixels may be a red
sub-pixel, a green sub-pixel and a blue sub-pixel, respectively. Of
course, the pixel unit PX may also include four, five or more
sub-pixels, which may be determined according to actual application
environments without limited here.
[0107] For example, pixel circuits 110 of at least two adjacent
sub-pixels in a same row may share one voltage control circuit 120.
For instance, in some examples, as illustrated in FIG. 5, all the
pixel circuits 110 in a same row may share one voltage control
circuit 120. Alternatively, in some other examples, adjacent two,
three or more sub-pixels in a same row may share one voltage
control circuit 120, without limited here. In this way, by sharing
the voltage control circuit 120, the area occupied by the pixel
circuit in the display region may be reduced.
[0108] FIG. 6 is a circuit diagram illustrating particular
implementation of a voltage control circuit and a pixel circuit
provided by some embodiments of the present disclosure. For
example, a driving transister M0 in the pixel circuit 110 (i.e.,
the driver circuit 610 in FIG. 4) may be a N-type transistor.
Furthermore, the light-emitting element L may include OLED. In this
way, an anode of the OLED is electrically connected with a second
electrode D of the driving transister M0, and a cathode of the OLED
is electrically connected with a second power source end VSS. A
voltage of the second power source end VSS is usually a negative
voltage or a grounded voltage VGND (usually is OV), and a voltage
of the initial signal Vinit may also be configured as the grounded
voltage VGND, without limited here. For example, the OELD may be
configured as Micro-OLED or Mini-OLED, which further facilitates to
achieve an OLED display panel with high PPI.
[0109] For example, as illustrated in FIG. 6, the voltage control
circuit 120 may include a first switching transistor M1 and a
second switching transistor M2; In addition to the driving
transister M0, the pixel circuit 110 may further include a third
switching transistor M3, a fourth switching transistor M4, a fifth
switching transistor M5 and a storage capacitor Cst.
[0110] For example, as illustrated in FIG. 6, a gate electrode of
the first switching transistor M1 is configured to receive the
reset control signal RE, a first electrode of the first switching
transistor M1 is configured to receive the initial signal Vinit,
and a second electrode of the first switching transistor M1 is
coupled with a first electrode of the third switching transistor
M3. A gate electrode of the second switching transistor M2 is
configured to receive the light-emitting control signal EM, a first
electrode of the second switching transistor M2 is configured to
receive the first power source signal VDD, and a second electrode
of the second switching transistor M2 is coupled with a first
electrode of the third switching transistor M3.
[0111] For example, the type of the first switching transistor M1
may be different from the type of the second switching transistor
M2. For example, the first switching transistor M1 may be N-type
transistor, while the second switching transistor M2 may be P-type
transistor. Alternatively, the first switching transistor M1 may be
P-type transistor, while the second switching transistor M2 may be
N-type transistor. Of course, the type of the first switching
transistor M1 may be as same as the type of the second switching
transistor M2. In actual application, the type of the first
switching transistor M1 and the type of the second switching
transistor M2 may be designed according to actual application
environment, without limited here.
[0112] For example, as illustrated in FIG. 6, a gate electrode of
the third switching transistor M3 is configured to receive a
control signal Vt; a first electrode of the third switching
transistor M3 is coupled with the second electrode of the first
switching transistor M1 and the second electrode of the second
switching transistor M2, and is configured to receive the initial
signal Vinit transmitted from the first switching transistor M1 or
receive the first power source signal VDD transmitted from the
second switching transistor M2; a second electrode of the third
switching transistor M3 is coupled with a first electrode S of the
driving transistor M0. For example, the third switching transistor
M3 may be controlled to be turned on or turned off by controlling
whether to input and transmit the control signal VT, so as to
control the light-emitting time of the light-emitting element L,
and hence to achieve pulse width modulation (PWM) dimming. Such
controlling method facilitates to ensure the uniformity of PWM
control of each sub-pixel.
[0113] For example, the pixel circuit 110 may further include a
fourth switching transistor M4 and a storage capacitor Cst. For
example, a gate electrode of the fourth switching transistor M4 is
configured to receive a gate scanning signal SN, a first electrode
of the fourth switching transistor M4 is configured to receive a
data signal DATA, and a second electrode of the fourth switching
transistor M4 is coupled with a gate electrode G of the driving
transister M0. A first end of the storage capacitor Cst is coupled
with the gate electrode G of the driving transister M0, and a
second end of the storage capacitor Cst is coupled with a first
voltage end V 1. A voltage of the first voltage end V1 may be a
grounded voltage VGND, embodiments of the present disclosure
include such case but are not limited thereto. For example, the
storage capacitor is configured to store the data signal DATA as
written in, so that the driving transister M0 drives the
light-emitting element L to emit light according to the data signal
DATA as stored.
[0114] For example, the pixel circuit 110 may further include a
fifth switching transistor M5. For example, a gate electrode of the
fifth switching transistor M5 is configured to receive an inversion
signal SN' of the gate scanning signal SN, a first electrode of the
fifth switching transistor M5 is configured to receive the data
signal DATA, and a second electrode of the fifth switching
transistor M5 is coupled with the gate electrode G of the driving
transister M0. Furthermore, the type of the fifth switching
transistor M5 is different from that of the fourth switching
transistor M4. For instance, in some examples, as illustrated in
FIG. 6, the fourth switching transistor M4 is N-type transistor
while the fifth switching transistor M5 is P-type transistor;
alternatively, in some other examples, the fourth switching
transistor M4 is P-type transistor while the fifth switching
transistor M5 is N-type transistor.
[0115] It should be explained that, the pixel circuit structure in
FIG. 6 is merely illustrated by way of example, and any other pixel
circuit structures may be adopted in the embodiments of the present
disclosure.
[0116] The driving transister M0, the first switching transistor
Ml, the second switching transistor M2, the third switching
transistor M3, the fourth switching transistor M4 and the fifth
switching transistor M5 as described above are MOS transistors
manufactured in the base substrate 600 (e.g., Si-based substrate).
For example, as least part of these transistors is located in the
base substrate. For example, source regions and drain regions of
these transistors are located in the base substrate 600.
[0117] Another embodiment of the present disclosure provides a LED
display device including the above-described LED display panel. The
LED display device provided by the embodiment of the present
disclosure is a small-sized LED display device, i.e., micro-LED
display device. The LED display device may be applied in any
product or component having display function, such as television,
digital camera, mobile phone, watch, tablet computer, notebook
computer, navigation device and the like, and is especially
applicable for helmet-mounted display, auto-stereoscopic display
mirror, eyeglass display and the like. The above-described
micro-LED display device may be coupled with mobile communication
network, satellite positioning system and the like, so as to
acquire precise image information anywhere and anytime.
[0118] The present embodiment is not limited thereto, and the LED
display device provided by the embodiment of the present disclosure
may also be applicable in virtual reality devices or augmented
reality devices.
[0119] The technical effect(s) of the LED display device provided
by the embodiments of the present disclosure may be referred to the
technical effect(s) of the color filter structure provided by the
embodiments of the present disclosure, without repeatedly described
here.
[0120] Another embodiment of the present disclosure provides a
manufacturing method of a LED display panel. FIG. 7 is a flow chart
of a manufacturing method of a LED display panel provided by an
embodiment of the present disclosure. Referring to FIGS. 2A-2H and
FIGS. 4-7, the manufacturing method includes the following
steps.
[0121] Step S101, providing a base substrate.
[0122] For example, as illustrated in FIG. 4, the base substrate
600 may be a Si-based substrate.
[0123] For example, as illustrated in FIG. 4, the base substrate
600 includes a display region 101 and a periphery region 102
surrounding the display region 101. The Si-based substrate 600 is
integrated with a driver circuit 610, a gate driver circuit and a
data driver circuit (not illustrated). The periphery region 102 of
the Si-based substrate 600 may be provided with a flexible circuit
board configured to transmit an electrical signal to the gate
driver circuit, the data driver circuit or the like.
[0124] For example, the driver circuit 610 may adopt a pixel
circuit of a circuit structure such as 4T1C, 4T2C, 7T1C, 8T2C and
the like, and a driving method thereof may adopt conventional
methods in the related art, without repeatedly described here. For
example, the pixel circuit structure may be manufactured on the
Si-based substrate by adopting a CMOS process, without particularly
limited in the embodiments of the present disclosure.
[0125] Step S102, forming a light-emitting element in the display
region on the base substrate.
[0126] For example, as illustrated in FIG. 4, forming the
light-emitting element 700 includes forming a first electrode 710,
a light-emitting functional layer 720 and a second electrode 730
that are sequentially laminated; the first electrode 710 is
electrically connected with the driver circuit 610; the driver
circuit 610 is configured to drive the light-emitting element 700
to emit light.
[0127] Step S103, coating a first color resistance material on the
light-emitting element by adopting a spin-coating method.
[0128] For example, in the actual process, the Si-based substrate
includes a plurality of LED display panel regions configured to
form a plurality of LED display panels. After the light-emitting
element is formed in each of the LED display panel regions, each of
the LED display panel regions is covered by a first color filter
material layer (i.e., the first color resistance material) which is
coated by adopting a spin-coating method. Of course, the
embodiments of the present disclosure are not limited to the
spin-coating method, and other methods may also be adopted to coat
the first color resistance material.
[0129] For example, the spin-coating method refers to a coating
process in which drops of coating material fallen onto a working
piece are dispersed onto the entire surface of the working piece by
means of a centrifugal force generated by a rotation of the working
piece and by means of an action of gravity. Coating a first color
filter material layer by using the spin-coating method includes:
dropping a first color filter material onto positions of the
Si-based substrate except the LED display panel regions (e.g.,
dropping the color filter material onto a center of the entire
Si-based substrate), and rotating the Si-based substrate to allow
the first color filter material to be uniformly dispersed onto
light-emitting elements in regions of the Si-based substrate,
including all the LED display panel regions, so as to form the
first color filter material layer having an uniform thickness.
[0130] For example, a coating speed as adopted may be different
depending on the color of the first color filter material.
[0131] For example, before forming the first color filter material
layer, the manufacturing method further includes: forming a
transparent base layer on the light-emitting element, i.e., a film
encapsulation layer to cover the light-emitting element.
[0132] Step S104, patterning the first color resistance material to
form a first color resistance layer in the display region and form
a first light-shielding structure surrounding the display region in
the periphery region.
[0133] For example, as illustrated in FIG. 2A, after performing
pre-baking, exposing, developing and post-baking to the first color
filter material layer, a first pixel color filter 210 (i.e., first
color resistance layer) may be formed in the display region 101,
and a first frame color filter 220 (i.e., first light-shielding
structure) may be formed in the periphery region 102. The first
frame color filter 220 as formed is an annular-shaped color filter
layer. For example, an outer contour of the first light-shielding
structure may include a first side extending along a first
direction and a second side extending along a second direction, the
first direction is intersected with the second direction, the first
side is connected with the second side through a cambered side, and
the cambered side is curved towards a direction away from the
display region. For example, both the first side and the second
side are straight sides.
[0134] For example, an exposure intensity and an exposure time as
adopted are different depending on the color of the first color
filter material layer.
[0135] In some examples, forming the first light-shielding
structure includes: patterning the first color resistance material
to allow the outer contour of the first light-shielding structure
to include a first side extending along a first direction and a
second side extending along a second direction, wherein the first
direction is intersected with the second direction, the first side
is connected with the second side through a cambered side, and the
cambered side is curved towards a direction away from the display
region.
[0136] In the embodiment of the present disclosure, at least one
angle of the outer annulus of the first frame color filter may be
designed as a cambered side, so that in the subsequent process of
forming other color filter layers, the probability that a color
filter material dropped to the outside of the LED display panel
regions (an outer side of the first frame color filter) presents a
divergent shape during the spin-coating process due to an influence
of the sharp angle of the outer frame of the first frame color
filter is reduced, so as to allow the color filter layer coated in
the display region to be more uniform, thereby preventing from the
occurrence of non-uniform display in the display device including
the color filter structure.
[0137] For example, the first pixel color filter and the first
frame color filter as formed in the embodiment of the present
disclosure possess characteristic(s) and technical effect(s) as
same as those of the first pixel color filter and the first frame
color filter illustrated in FIG. 2A and FIG. 2B, without repeatedly
described here.
[0138] Step S105, coating a second color resistance material on the
first color resistance layer and on the first light-shielding
structure by adopting the spin-coating method.
[0139] In some examples, as illustrated in FIG. 2C and FIG. 2D,
after forming the first pixel color filter and the first frame
color filter, the manufacturing method further includes: coating a
second color filter material layer (i.e., second color resistance
material) on the first pixel color filter 210 and on the first
frame color filter 220 by adopting a spin-coating method. Of
course, the embodiments of the present disclosure are not limited
to the spin-coating method, and other methods may also be adopted
to coat the second color resistance material.
[0140] For example, dropping a second color filter material onto
regions at an outer side of the first frame color filter 220, and
rotating the Si-based substrate 600 to allow the second color
filter material to be uniformly coated onto display regions 101 and
periphery regions 102 of the LED display panel regions so as to
form the second color filter material layer. When the angle of the
outer annulus of the first frame color filter as formed is a
rounded angle, during spin-coating the second color filter
material, the second color filter material that is spin-coated onto
the display regions of the LED display panel regions has relatively
uniform thickness, so as to prevent from the occurrence of
non-uniform display in the subsequent display period.
[0141] Step S106, patterning the second color resistance material
to form a second color resistance layer in the display region and
form a second light-shielding structure surrounding the display
region in the periphery region, wherein at least part of the second
color resistance layer is not overlapped with the first color
resistance layer.
[0142] For example, as illustrated in FIG. 2C and FIG. 2D, after
coating a second color filter material layer, patterning the second
color filter material layer, for example, exposing and developing
the second color filter material layer so as to form a second pixel
color filter 310 (i.e., second color resistance layer) in the
display region 101, and to form an annular-shaped second frame
color filter 320 (i.e., second light-shielding structure)
surrounding the display region 101 on the first frame color filter
220, wherein at least part of the second pixel color filter 310 is
not overlapped with the first pixel color filter 210.
[0143] Forming the second light-shielding structure includes:
patterning the second color resistance material, so that in a
direction perpendicular to an extension direction of the first
light-shielding structure, a width of the second light-shielding
structure is smaller than a width of the first light-shielding
structure so as to form a stepped structure.
[0144] Compared to the case where the size of the first frame color
filter is exactly the same with the size of the second frame color
filter, in the embodiment of the present disclosure, the width of
the second frame color filter is formed to be smaller than the
width of the first frame color filter so as to form a stepped
structure, which can facilitate the flow of the color filter
material during the process of forming subsequent color filter
layers by using a spin-coating method, thereby further improving
the uniformity of the pixel color filters formed in the display
region and preventing from the occurrence of non-uniform display
during the subsequent display period.
[0145] For example, the above-mentioned stepped structure may be
located at a side of the second frame color filter close to the
display region, and may also be located at a side of the second
frame color filter away from the display region. Alternatively, the
above-mentioned stepped structure may be provided at both the side
of the second frame color filter close to the display region and
the side of the second frame color filter away from the display
region so as to be advantageous for the uniformity of the pixel
color filter subsequently formed in the display region. The second
pixel color filter formed by the manufacturing method provided by
the embodiment of the present disclosure possesses the
characteristic(s) and technical effect(s) as same as those of the
second pixel color filter illustrated in FIG. 2C and FIG. 2D,
without repeatedly described here.
[0146] For example, as illustrated in FIG. 2C and FIG. 2D, the
shape of the second frame color filter 320 formed on the first
frame color filter 220 may be as same as the shape of the first
frame color filter 220. For example, the angle of the outer annulus
of the second frame color filter 320 may also be a rounded angle,
so that during the process of forming subsequent color filter
layers by adopting the spin-coating method, the color filter layer
spin-coated in the display region has better uniformity.
[0147] In some examples, as illustrated in FIG. 2E and FIG. 2F,
after forming the second pixel color filter and the second frame
color filter, the manufacturing method further includes: coating a
third color filter material layer on the second pixel color filter
310 and on the second frame color filter 320 by adopting a
spin-coating method.
[0148] For example, dropping a third color filter material (i.e.,
third color resistance material) onto regions at an outer side of
the second frame color filter 320, and rotating the Si-based
substrate 600 to allow the third color filter material to be
uniformly coated onto display regions 101 and periphery regions 102
of the LED display panel regions so as to form the third color
filter material layer. Because the angle of the outer annulus of
the first frame color filter and the angle of the outer annulus of
the second frame color filter as formed are rounded angles, and
because the first frame color filter and the second frame color
filter form a stepped structure, during spin-coating the third
color filter material, the third color filter material that is
spin-coated onto the display regions of the LED display panel
regions has relatively uniform thickness, so as to prevent from the
occurrence of non-uniform display in the subsequent display
period.
[0149] For example, as illustrated in FIG. 2E and FIG. 2F, after
coating a third color filter material layer, patterning the third
color filter material layer, for example, exposing and developing
the third color filter material layer so as to form a third pixel
color filter 410 (i.e., third color resistance layer) in the
display region 101, and to form a third frame color filter 420
(i.e., third light-shielding structure) surrounding the display
region 101 on the second frame color filter 320, wherein at least
part of the third pixel color filter 410 is not overlapped with the
first pixel color filter 210 and the second pixel color filter
310.
[0150] For example, the third pixel color filter and the third
frame color filter as formed in the present embodiment possess
characteristic(s) and technical effect(s) as same as those of the
third pixel color filter and the third frame color filter
illustrated in FIG. 2E and FIG. 2F, without repeatedly described
here. Of course, the third pixel color filter and the third frame
color filter as formed in the present embodiment may also possess
characteristic(s) and technical effect(s) as same as those of the
third pixel color filter and the third frame color filter
illustrated in FIG. 2G and FIG. 2H, without repeatedly described
here.
[0151] Another example of the present embodiment provides a
manufacturing method of a LED display panel. Referring to FIGS.
3A-3E, the manufacturing method of the present example is different
from the manufacturing method provided by the previous example in
that, before forming the first color filter material layer, it
further includes: coating a fourth color filter material layer on
the light-emitting element by adopting a spin-coating method, and
patterning the fourth color filter material layer to only form a
fourth pixel color filter 510 in the display region 101. The fourth
color filter material layer in the present example and the third
color filer material layer in the previous example are color filter
material layers of the same color, with the difference that, the
fourth color filter material layer in the present example is formed
prior to the first color filter layer, and the periphery region
only includes two color filter layers which are the first frame
color filter and the second frame color filter. Of course, the
embodiments of the present disclosure are not limited thereto, and
the fourth color filter material layer may also be a color filter
material layer having a color different from that of the third
color filter material layer in the previous example.
[0152] For example, dropping a fourth color filter material onto
positions of the Si-based substrate except the LED display panel
regions, and rotating the Si-based substrate to allow the fourth
color filter material to be uniformly dispersed onto light-emitting
elements in the plurality of LED display panel regions so as to
form a fourth color filter material layer with uniform thickness.
Then pre-baking, exposing, developing and post-baking the fourth
color filter material layer so as to only form the fourth pixel
color filter in the display region.
[0153] For example, after forming the fourth pixel color filter,
coating a first color filter material layer on the fourth pixel
color filter by adopting a spin-coating method. That is, dropping a
first color filter material onto positions of the Si-based
substrate except the LED display panel regions, and rotating the
Si-based substrate to allow the first color filter material to be
uniformly dispersed onto display regions and periphery regions
(including the fourth pixel color filter) of the plurality of LED
display panel regions so as to form a first color filter material
layer with uniform thickness. Then patterning the first color
filter material layer to form a first pixel color filter in the
display region and to form a first frame color filter surrounding
the display region in the periphery region, wherein at least part
of the first pixel color filter is not overlapped with the fourth
pixel color filter. The first pixel color filter and the first
frame color filter formed in the present example possess the same
characteristic(s) and the same technical effect(s) with those of
the first pixel color filter and the first frame color filter
formed by the manufacturing method provided in the previous
example, without repeatedly described here.
[0154] For example, in the manufacturing method provided by the
present example, after forming the first pixel color filter and the
first frame color filter, the second pixel color filter as formed
has the same characteristic(s) and the same technical effect(s)
with those of the second pixel color filter formed in the previous
example, without repeatedly described here.
[0155] For example, the second frame color filter formed by the
manufacturing method provided by the present example not only needs
to have a same shape with that of the first frame color filter but
also needs to have an orthographic projection on the transparent
base layer to be at least completely coincident with an
orthographic projection of the first frame color filter on the
transparent base layer, so as to serve for light shielding together
with the first frame color filter.
[0156] For example, after forming the color filter structure, the
manufacturing method provided by the embodiments of the present
disclosure further includes: forming a film encapsulation layer at
a side of the color filter structure away from the light-emitting
element. Two film encapsulation layers located at both sides of the
color filter structure, respectively, can realize an effective
encapsulation of the light-emitting element and realize an
effective shield against moisture, oxygen and the like, thereby
achieving the objective of protecting the light-emitting element
and increasing the service life of the light-emitting element.
[0157] For example, both of the two film encapsulation layers may
be formed by one or more selected from organic materials or
inorganic materials that have better sealing property, so as to
achieve better sealing effect and to protect Si-based OLED display
elements.
[0158] For example, after forming a film encapsulation layer at a
side of the color filter structure away from the light-emitting
element, the manufacturing method further includes: forming a cover
plate at a side of the film encapsulation layer away from the color
filter structure to protect the color filter structure.
[0159] For example, the cover plate may adopt a transparent
material, for example, the transparent material may be an inorganic
material such as glass or an organic material such as polyimide.
For example, in the embodiment of the present disclosure, a mother
glass with high transmittance may be adopted, without particularly
limited here.
[0160] The technical effect(s) of the LED display panel obtained by
the manufacturing method provided by the embodiments of the present
disclosure may be referred to the technical effect(s) of the color
filter structure provided by the embodiments of the present
disclosure, without particularly limited here.
[0161] The following statements should be noted:
[0162] (1) The drawings accompanying the embodiments of the present
disclosure involve only the structure(s) in connection with the
embodiment(s) of the present disclosure, and other structure(s) can
be referred to common design(s).
[0163] (2) In case of no conflict, the features in the same
embodiment or in different embodiments can be combined with each
other.
[0164] What have been described above are only specific
implementations of the present disclosure, the protection scope of
the present disclosure is not limited thereto. The protection scope
of the present disclosure should be based on the protection scope
of the claims.
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